Expected Completion Time Aware Message Scheduling for UM-BUS Interconnected System

In real-time embedded systems, periodic messages need to be transmitted at the expected time because of timing sensitive requirements. In this paper, we take advantage of the characteristics of UM-BUS, a novel serial bus with the capability of multi-lane concurrent transmissions, and investigate the scheduling problem to reduce the deviation to the expected completion time of messages. By configuring different lanes to change the bus utilization, two sets of experiments were implemented to evaluate the effectiveness of the proposed algorithm. The results show that the heuristic algorithm works effectively and can achieve a deviation within 1.52% which is significantly smaller comparing to the existing scheduling algorithms.